diff --git a/AppImage/components/hardware.tsx b/AppImage/components/hardware.tsx
index f0a5f6f..2ff78e8 100644
--- a/AppImage/components/hardware.tsx
+++ b/AppImage/components/hardware.tsx
@@ -1788,13 +1788,15 @@ export default function Hardware() {
               {selectedDisk.rotation_rate !== undefined && selectedDisk.rotation_rate !== null && (
                 <div className="flex justify-between border-b border-border/50 pb-2">
                   <span className="text-sm font-medium text-muted-foreground">Rotation Rate</span>
-                  <span className="text-sm">
-                    {typeof selectedDisk.rotation_rate === "number" && selectedDisk.rotation_rate > 0
-                      ? `${selectedDisk.rotation_rate} rpm`
-                      : typeof selectedDisk.rotation_rate === "string"
-                        ? selectedDisk.rotation_rate
-                        : "Solid State Device"}
-                  </span>
+                  <div className="text-sm">
+                    {typeof selectedDisk.rotation_rate === "number" && selectedDisk.rotation_rate === -1
+                      ? "N/A"
+                      : typeof selectedDisk.rotation_rate === "number" && selectedDisk.rotation_rate > 0
+                        ? `${selectedDisk.rotation_rate} rpm`
+                        : typeof selectedDisk.rotation_rate === "string"
+                          ? selectedDisk.rotation_rate
+                          : "Solid State Device"}
+                  </div>
                 </div>
               )}
 
diff --git a/AppImage/components/storage-overview.tsx b/AppImage/components/storage-overview.tsx
index e7263cc..7debfe6 100644
--- a/AppImage/components/storage-overview.tsx
+++ b/AppImage/components/storage-overview.tsx
@@ -211,6 +211,12 @@ export function StorageOverview() {
     if (diskName.startsWith("nvme")) {
       return "NVMe"
     }
+    // rotation_rate = -1 means HDD but RPM is unknown (detected via kernel rotational flag)
+    // rotation_rate = 0 or undefined means SSD
+    // rotation_rate > 0 means HDD with known RPM
+    if (rotationRate === -1) {
+      return "HDD"
+    }
     if (!rotationRate || rotationRate === 0) {
       return "SSD"
     }
diff --git a/AppImage/scripts/flask_server.py b/AppImage/scripts/flask_server.py
index 7533f0b..e3c9084 100644
--- a/AppImage/scripts/flask_server.py
+++ b/AppImage/scripts/flask_server.py
@@ -1387,6 +1387,26 @@ def get_smart_data(disk_name):
                 smart_data['health'] = 'warning'
                 # print(f"[v0] Health: WARNING (temperature {smart_data['temperature']}°C)")
                 pass
+
+        # CHANGE: Use -1 to indicate HDD with unknown RPM instead of inventing 7200 RPM
+        # Fallback: Check kernel's rotational flag if smartctl didn't provide rotation_rate
+        # This fixes detection for older disks that don't report RPM via smartctl
+        if smart_data['rotation_rate'] == 0:
+            try:
+                rotational_path = f"/sys/block/{disk_name}/queue/rotational"
+                if os.path.exists(rotational_path):
+                    with open(rotational_path, 'r') as f:
+                        rotational = int(f.read().strip())
+                        if rotational == 1:
+                            # Disk is rotational (HDD), use -1 to indicate "HDD but RPM unknown"
+                            smart_data['rotation_rate'] = -1
+                        # If rotational == 0, it's an SSD, keep rotation_rate as 0
+    except Exception as e:
+        pass  # If we can't read the file, leave rotation_rate as is
+
+    except FileNotFoundError:
+        # print(f"[v0] ERROR: smartctl not found - install smartmontools for disk monitoring.")
+        pass
             
     except FileNotFoundError:
         # print(f"[v0] ERROR: smartctl not found - install smartmontools for disk monitoring.")